CN113235389A - Ground anchor type suspension bridge structure suitable for special terrain - Google Patents
Ground anchor type suspension bridge structure suitable for special terrain Download PDFInfo
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- CN113235389A CN113235389A CN202110358360.9A CN202110358360A CN113235389A CN 113235389 A CN113235389 A CN 113235389A CN 202110358360 A CN202110358360 A CN 202110358360A CN 113235389 A CN113235389 A CN 113235389A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D11/00—Suspension or cable-stayed bridges
- E01D11/02—Suspension bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D12/00—Bridges characterised by a combination of structures not covered as a whole by a single one of groups E01D2/00 - E01D11/00
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
Abstract
The invention relates to an anchor-type suspension bridge structure suitable for special terrains, one end of the anchor-type suspension bridge structure is fixed on a relatively flat bank of the terrains, and the other end of the anchor-type suspension bridge structure is fixed on a steep bank of the terrains; the first stress system consists of a main cable, a cable tower, a novel roller type cable saddle, a main cable saddle, a scattered cable saddle, a tunnel type anchorage and a gravity type anchorage; the second stress system consists of a steel truss stiffening beam and a sling; the third stress system is composed of a ground anchor structure, a vertical ground anchor sling, a central buckle stay cable and a cable clamp, the first stress system and the second stress system participate in the integral stress of the structure, and the third stress system bears live load and transmits the load to the steel truss stiffening girder. The ground anchor type suspension bridge structure suitable for the special terrain is a suspension bridge type which has the advantages of novel structure form, strong spanning capability, less excavation amount and blasting amount, short construction period, considerable economic benefit and environmental friendliness.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to an earth anchor type suspension bridge structure suitable for special terrains.
Background
The suspension bridge is a flexible cable-crane combined system composed of a main cable, a stiffening beam, a main tower, a saddle, an anchorage, a sling, a cable clamp and other components. The bridge has simple structure, definite stress and large spanning capacity, has little competitor when the main span exceeds 1000m, and has great competitive power when the span is more than 600m compared with other bridge types.
Suspension bridges can be divided into earth anchored suspension bridges and self anchored suspension bridges according to the anchoring form of the main cable. Compared with a self-anchored suspension bridge, the ground-anchored suspension bridge is widely adopted due to the advantages of smaller construction difficulty, lower construction cost, no need of system conversion in the construction process and the like. At present, the ground anchor type suspension bridge mostly adopts a double-cable-tower arrangement, namely, a main cable saddle is arranged on two symmetrical cable towers to support a main cable. When the suspension bridge is built in a plain area with flat terrain and good geological conditions, the double-cable-tower ground anchor type suspension bridge can achieve the effects of attractive appearance and reasonable manufacturing cost. However, when the bridge site has a special topography (a steep topography and a flat topography), in order to ensure the construction safety and avoid damage to the natural environment, excavation should be reduced as much as possible and blasting should be avoided as much as possible in principle. At this moment, if the conventional double-tower arrangement is still adopted, the reduction of the excavation amount is not facilitated, and the reduction of the construction cost, the shortening of the construction period, the guarantee of the construction safety and the protection of the natural environment are also not facilitated. Therefore, it is important to provide an earth anchored suspension bridge structure suitable for this particular terrain.
Disclosure of Invention
In view of the above background, the present invention provides an earth-anchored suspension bridge structure which has a novel structural style, strong crossing capability, superior stress performance, less excavation and blasting amount, short construction period, considerable economic benefit, environmental friendliness, and is especially suitable for the above special terrain.
The technical scheme adopted by the invention is as follows:
an earth anchor type suspension bridge structure suitable for special terrains is characterized in that one end of the earth anchor type suspension bridge structure suitable for special terrains is fixed on a relatively flat bank of the terrains, and the other end of the earth anchor type suspension bridge structure suitable for special terrains is fixed on a steep bank of the terrains; the first stress system is composed of a main cable, a cable tower, a novel roller type cable saddle, a main cable saddle, a tunnel type anchor and a gravity type anchor, the cable tower and the gravity type anchor are built on a bank with a relatively flat terrain, one end of the main cable is anchored in the gravity type anchor through the main cable saddle and the cable saddle, the main cable saddle is arranged at the top of the cable tower, the cable tower is not arranged on a steep terrain cliff side, the tunnel type anchor is adopted, the novel roller type cable saddle is arranged in the tunnel type anchor, and the other end of the main cable is dispersedly anchored in the tunnel type anchor through the novel roller type cable saddle; the second stress system consists of a steel truss stiffening girder and a sling, and the steel truss stiffening girder is suspended below the main cable through the sling; the third stress system is composed of a ground anchor structure, a vertical ground anchor sling, a central buckle stay cable and a cable clamp, the first stress system and the second stress system participate in the integral stress of the structure, and the third stress system bears live load and transmits the load to the steel truss stiffening girder.
Preferably, the number of the full-bridge main cables is two, and the main cables adopt prefabricated parallel steel wire cable strands PPWS.
Preferably, the sling adopts prefabricated zinc-plated high-strength steel wire parallel steel wire cable strands, a double-layer PE layer is wrapped outside the sling, one end of the sling is connected with the main cable through a cable clamp, and the other end of the sling is anchored on the steel truss stiffening beam.
Preferably, the cable tower comprises cable tower towers, cable tower upper cross beams, cable tower lower cross beams, bearing platforms and a pile foundation, a double-column portal frame structure is formed between the cable tower towers through the cable tower upper cross beams and the cable tower lower cross beams, the cable tower towers adopt rectangular hollow thin-wall sections, the cable tower upper cross beams and the cable tower lower cross beams adopt prestressed concrete box-shaped sections, the bearing platforms are connected to the bottoms of the cable tower towers, and the bearing platforms are fixed in the foundation through the pile foundation.
Preferably, the steel truss stiffening girder consists of a steel truss and a bridge deck system; the steel truss comprises main truss, main horizontal truss, upper and lower tie, and the main truss comprises upper chord member, main truss diagonal web member, lower chord member and main truss vertical web member, and upper and lower tie adopts the K-shaped system, and main horizontal truss comprises entablature, bottom end rail, main horizontal truss vertical web member and main horizontal truss diagonal web member. The bridge deck system adopts the combination form of I-shaped steel longeron and concrete decking, supports on the steel truss through the support.
Preferably, the main cable saddle on the cable tower adopts a rib force-transferring cast-weld combined cable saddle; the cable saddle adopts a swing shaft type cast-weld combined cable saddle; the saddle groove of the novel roller type cable saddle is cast by cast steel, and the base is welded by a steel plate; a rolling pair is arranged below the novel roller type cable saddle; vertical clapboards are arranged in the saddle groove along the bridge direction, the top of the saddle groove is filled with zinc blocks, the side wall of the saddle groove is clamped through bolts, and transverse stiffening ribs are arranged on the saddle body.
Preferably, the gravity type anchorage is composed of an anchor block, a gravity anchor front anchor chamber, a cable saddle buttress and a gravity anchor rear anchor chamber, the gravity anchor front anchor chamber and the gravity anchor rear anchor chamber are closed spaces, a dehumidifier is arranged in each closed space, and the anchor block, the cable saddle buttress and the anchor chamber form a complete three-rod-piece herringbone space stress component.
Preferably, the tunnel type anchorage is composed of a conical anchor plug body, a tunnel anchor front anchor chamber, a cable saddle foundation and a tunnel anchor rear anchor chamber.
Preferably, one end of the central buckle stay cable is connected with the main cable through a cable clamp, the other end of the central buckle stay cable is anchored on the steel truss stiffening girder through an anchor cup and a forked lug plate, and the central buckle stay cable is made of a high-quality steel core steel wire rope.
Preferably, the sling-free sections on two sides of the main cable are also connected with vertical ground anchor slings, each vertical ground anchor sling comprises an anchoring base, a concrete cushion pier and a prestressed anchor rod, the anchoring base and the concrete cushion pier are connected through the prestressed anchor rod, and the bottom of the prestressed anchor rod penetrates through the concrete cushion pier and is inserted into the foundation.
The invention has the beneficial effects that:
1. the ground anchor type suspension bridge structure suitable for the special terrain is only provided with one cable tower on a relatively flat bank in the terrain, but is not provided with the cable tower on a steep cliff, and the novel roller type cable saddle is combined with the tunnel type anchor design, so that the ground anchor type suspension bridge structure is capable of avoiding large-scale excavation of the steep cliff compared with a double-tower ground anchor type suspension bridge, shortening the construction period, saving the cost, reducing the environmental disturbance to the maximum extent and protecting the natural environment.
2. The ground-anchored suspension bridge structure suitable for special terrains has the advantages of good spanning capability, good adaptability to mountainous region canyon terrains, novel structural form and unique appearance characteristics, so that the landscape design is more diversified, and the ground-anchored suspension bridge structure is particularly suitable for the design of spanning large canyon suspension bridges in mountainous region canyon terrain scenic spots and the like with high requirements on the landscape.
3. The ground anchor type suspension bridge structure suitable for special terrains adopts high-performance prestressed steel bundles as vertical ground anchor suspension cables, solves the problem that the stress and the stress amplitude of stiffening beams and side suspension cables in a sling-free area are higher, enables the maximum axial force amplitude of a main truss to be transferred to the midspan direction, is stable in axial force transition, reduces the stress and the stress amplitude of the stiffening beams in the sling-free area, and can meet the requirement of fatigue stress without thickening.
4. The ground anchor type suspension bridge structure suitable for special terrains is provided with the flexible central buckle in the midspan, so that the rigidity of the full bridge can be effectively improved, the longitudinal displacement of the stiffening beam is reduced, the integral natural vibration frequency of the structure is increased, and the bending and fatigue problems of short slings near the midspan position can be partially improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the cable tower of the present invention;
FIG. 3 is a schematic structural view of a main truss of the steel truss stiffening girder according to the present invention;
FIG. 4 is a schematic view of the construction of a main transverse truss of the steel truss stiffening girder according to the present invention;
FIG. 5 is a schematic cross-sectional configuration of a steel truss stiffener of the present invention;
FIG. 6 is a schematic view of the construction of the main cable saddle of the present invention;
FIG. 7 is a schematic view of the construction of the slack cable saddle of the present invention;
FIG. 8 is a schematic diagram of the construction of the novel roller cable saddle of the present invention;
fig. 9 is a schematic structural view of a gravity type anchorage of the present invention;
fig. 10 is a schematic structural view of a tunnel-type anchorage of the present invention;
FIG. 11 is a schematic view showing the construction of the center buckle stay cable according to the present invention;
FIG. 12 is a schematic view of the vertical ground anchor sling mounting location of the present invention;
FIG. 13 is a schematic view of the construction of the vertical ground anchor sling of the present invention;
in fig. 1-13, 1-main cable, 2-cable tower, 3-new roller cable saddle, 4-main cable saddle, 5-slack cable saddle, 6-tunnel anchor, 7-gravity anchor, 8-ground anchor structure, 9-steel truss stiffening beam, 10-sling, 11-vertical ground anchor sling, 12-center buckle stay cable, 13-cable clamp, 14-cable tower column, 15-cable tower upper beam, 16-cable tower lower beam, 17-bearing platform, 18-pile foundation, 19-upper chord, 20-main truss diagonal web, 21-lower chord, 22-main truss vertical web, 23-upper beam, 24-lower beam, 25-main cross truss vertical web, 26-main cross truss diagonal web, 27-i-steel longitudinal beam, 28-concrete bridge deck, 29-bearing, 30-saddle groove, 31-base, 32-transverse stiffening rib, 33-anchor block, 34-anchor block, 35-front anchor room, 36-gravity anchor room-rear anchor chamber, 37-conical anchor plug body, 38-front anchor chamber of tunnel anchor, 39-cable saddle foundation, 40-rear anchor chamber of tunnel anchor, 41-anchor cup, 42-fork-shaped lug plate, 43-anchor base, 44-concrete pad pier and 45-prestressed anchor rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the present invention is an earth anchor type suspension bridge structure suitable for a special terrain, one end of which is fixed to a relatively flat bank of the terrain and the other end of which is fixed to a steep bank of the terrain, and the earth anchor type suspension bridge structure suitable for a special terrain comprises a first stress system, a second stress system and a third stress system. The first stress system is composed of a main cable 1, a cable tower 2, a novel roller type cable saddle 3, a main cable saddle 4, a scattered cable saddle 5, a tunnel type anchor 6 and a gravity type anchor 7, the cable tower 2 and the gravity type anchor 7 are built on a bank with a relatively flat terrain, one end of the main cable 1 is anchored in the gravity type anchor 7 through the main cable saddle 4 and the scattered cable saddle 5, the main cable saddle 4 is arranged at the top of the cable tower 2, the cable tower 2 is not arranged on a steep bank of the terrain, the tunnel type anchor 6 is adopted, the novel roller type cable saddle 3 is arranged in the tunnel type anchor 6, and the other end of the main cable 1 is dispersedly anchored in the tunnel type anchor 6 through the novel roller type cable saddle 3; the first stress system takes the main cable 1 as a main stress component and forms the strength and rigidity of a full bridge. The second stress system is composed of a steel truss stiffening girder 9 and a sling 10, and the steel truss stiffening girder 9 is suspended below the main cable 1 through the sling 10. The third stress system is composed of a ground anchor structure 8, a vertical ground anchor sling 11, a central buckle stay cable 12 and a cable clamp 13, the first stress system and the second stress system participate in the whole stress of the structure, the third stress system bears live load and transmits the load to the steel truss stiffening girder 9 without directly participating in the whole stress of the structure.
This be applicable to the total two of number of full-bridge main push-towing rope 1 of ground anchor formula suspension bridge structure of special topography, main push-towing rope 1 adopts prefabricated parallel steel wire cable strand PPWS. The sling 10 adopts prefabricated galvanized high-strength steel wire parallel steel wire strands, is covered with a double-layer PE layer for protection, one end of the sling 10 is connected with the main cable 1 through a cable clamp 13, and the other end of the sling is anchored on the steel truss stiffening girder 9.
As shown in fig. 2, the cable tower 2 of the ground-anchored suspension bridge structure suitable for special terrains is composed of cable tower towers 14, cable tower upper cross beams 15, cable tower lower cross beams 16, bearing platforms 17 and pile foundations 18, in order to improve the stress of the cable tower towers 14 and improve the stability of the cable tower towers 14, a double-column portal frame structure is formed between the cable tower towers 14 through the cable tower upper cross beams 15 and the cable tower lower cross beams 16, the cable tower towers 14 can adopt rectangular hollow thin-wall sections, the cable tower upper cross beams 15 and the cable tower lower cross beams 16 adopt prestressed concrete box-shaped sections, the bottom of the cable tower towers 14 is connected with the bearing platforms 17, and the bearing platforms 17 are fixed in a foundation through the pile foundations 18. The cable tower 2 mainly bears the vertical pressure of the main cable 1, and is transmitted to the bearing platform 17 and the pile foundation 18 through the cable tower column 14, and then is transmitted into the foundation through the bearing platform 17 and the pile foundation 18.
As shown in fig. 3, the steel truss girder 9 of the ground anchored suspension bridge structure suitable for special terrains is composed of a steel truss and a deck system. The steel truss is composed of a main truss, a main transverse truss and upper and lower horizontal couplings, the main truss is composed of an upper chord member 19, a main truss diagonal web member 20, a lower chord member 21 and a main truss vertical web member 22, and as shown in fig. 4, the upper and lower horizontal couplings adopt a K-shaped system. As shown in fig. 5, the main cross girder may be a single-layer girder structure, and is composed of an upper cross girder 23, a lower cross girder 24, a main cross girder vertical web member 25, and a main cross girder diagonal web member 26. The deck system may be in the form of a combination of i-beam stringers 27 and concrete deck slab 28 as shown in figure 5, the deck slab being a precast concrete slab, the combination being formed by shear studs on the i-beam stringers 27 at the joints and the i-beam stringers 27. The deck system is supported on the steel trusses by means of supports 29.
As shown in fig. 6-7, the main cable saddle 4 on the cable tower 2 of the ground anchor type suspension bridge structure suitable for special terrains adopts a rib force-transferring cast-welded combined cable saddle; the cable saddle 5 adopts a swing shaft type cast-weld combined cable saddle. The rib force-transferring cast-weld combined cable saddle and the swing shaft type cast-weld combined cable saddle both belong to the existing cable saddles. As shown in fig. 8, the novel roller cable saddle 3 may be designed as a roller cable saddle 3 integrating the functions of the main cable saddle 4 and the cable saddle 5, the saddle groove 30 of the novel roller cable saddle 3 is cast by cast steel, and the base 31 is welded by steel plates. A rolling pair is arranged below the novel roller type cable saddle 3, and the saddle body can adapt to relative movement in the construction and operation processes through the rolling pair. In order to increase the frictional resistance between the main cable 1 and the saddle groove 30 and facilitate the positioning of the cable strands, vertical partition plates are arranged in the saddle groove 30 along the bridge direction, after the cable strands are all in place and are stranded, the tops of the cable strands are filled by zinc blocks, and then the side walls of the saddle groove 30 are clamped by bolts. In order to improve the rigidity of the novel roller-type cable saddle 3, a plurality of transverse stiffening ribs 32 are arranged on the saddle body of the novel roller-type cable saddle 3 so as to improve the stress state of the novel roller-type cable saddle 3.
As shown in fig. 9, the gravity anchor 7 of the ground anchor type suspension bridge structure suitable for the special terrain is composed of an anchor block 33, a front anchor chamber 34 of the gravity anchor, a saddle buttress 35 and a rear anchor chamber 36 of the gravity anchor. The anchor block 33 mainly bears the tension of the main cable 1 strand transmitted by the steel pull rod anchoring system; the cable saddle buttress 35 mainly bears the pressure of the main cable 1 transmitted by the cable saddle 5; the front anchor chamber 34 and the rear anchor chamber 36 of the gravity anchor are closed spaces, and a dehumidifier is arranged in the closed spaces to protect the strands of the main cable 1; the anchor blocks 33, the saddle piers 35 and the anchor chambers 34, 36 form a complete three-bar herringbone configuration of space force-bearing members. As shown in fig. 10, the tunnel anchor 6 of the ground anchor suspension bridge structure suitable for special terrains is composed of a conical anchor plug body 37, a tunnel anchor front anchor chamber 38, a cable saddle foundation 39 and a tunnel anchor rear anchor chamber 40. By adopting the tunnel type anchorage 6, the geological conditions of an anchor site area can be well utilized, the earth excavation amount of the tunnel type anchorage is greatly reduced relative to a gravity anchor, the construction period can be shortened, the cost performance is high, meanwhile, the disturbance to the surrounding environment is small, and the environment is protected.
As shown in fig. 11, the center buckle stay cable 12 of the ground anchor type suspension bridge structure suitable for special terrains is connected to the main cable 1 at one end by a cable clamp 13, and is anchored to the steel truss stiffening girder 9 at the other end by an anchor cup 41 and a forked lug 42. The central buckle stay cable 12 adopts a high-quality steel core steel wire rope, and the bending and fatigue problems of the short sling 10 at the midspan position can be partially improved by arranging the central buckle stay cable 12. Aiming at the problems that the deformation of the main cable 1 and the steel truss stiffening girder 9 is inconsistent and the stress amplitude of the steel truss stiffening girder 9 and the side sling 10 are higher easily caused by the area without the sling 10 at the side without the cable tower 2. As shown in fig. 12, the ground anchor type suspension bridge structure suitable for the special topography is further connected with vertical ground anchor suspension cables 11 on sections without suspension cables 10 at two sides of the main cable 1, so as to increase the structural rigidity, reduce the live load deformation of the main cable 1 in the area without the suspension cables 10, and effectively improve the stress amplitude of the girder end trusses and the side suspension cables 10 of the steel truss stiffening girder 9. As shown in fig. 13, the vertical ground anchor sling 11 is composed of an anchor base 43, a concrete pad pier 44 and a pre-stressed anchor 45, the anchor base 43 and the concrete pad pier 44 are connected by the pre-stressed anchor 45, and the bottom of the pre-stressed anchor 45 is inserted into the ground through the concrete pad pier 44. After the vertical ground anchor sling 11 is added, the area with the maximum axial force amplitude of each chord of the main truss of the steel truss stiffening girder 9 is transferred to the midspan direction, the axial force transition is stable, the axial force of the area of the beam end is greatly reduced, and the stress requirement can be met without thickening the upper chord 19 and the lower chord 21 of the main truss of the beam end steel truss stiffening girder 9.
Claims (10)
1. The utility model provides an earth anchor formula suspension bridge structure suitable for special topography which characterized in that: one end of the ground anchor type suspension bridge structure suitable for special terrains is fixed on a relatively flat bank of the terrains, and the other end of the ground anchor type suspension bridge structure is fixed on a steep bank of the terrains and comprises a first stress system, a second stress system and a third stress system; the first stress system is composed of a main cable, a cable tower, a novel roller type cable saddle, a main cable saddle, a tunnel type anchor and a gravity type anchor, the cable tower and the gravity type anchor are built on a bank with a relatively flat terrain, one end of the main cable is anchored in the gravity type anchor through the main cable saddle and the cable saddle, the main cable saddle is arranged at the top of the cable tower, the cable tower is not arranged on a steep terrain cliff side, the tunnel type anchor is adopted, the novel roller type cable saddle is arranged in the tunnel type anchor, and the other end of the main cable is dispersedly anchored in the tunnel type anchor through the novel roller type cable saddle; the second stress system consists of a steel truss stiffening girder and a sling, and the steel truss stiffening girder is suspended below the main cable through the sling; the third stress system is composed of a ground anchor structure, a vertical ground anchor sling, a central buckle stay cable and a cable clamp, the first stress system and the second stress system participate in the integral stress of the structure, and the third stress system bears live load and transmits the load to the steel truss stiffening girder.
2. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the total number of full-bridge main cables is two, and the main cables adopt prefabricated parallel steel wire cable strand PPWS.
3. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the sling adopts prefabricated galvanized high-strength steel wire parallel steel wire strands, is wrapped by a double-layer PE layer, one end of the sling is connected with the main cable through a cable clamp, and the other end of the sling is anchored on the steel truss stiffening beam.
4. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the cable tower is composed of cable tower towers, cable tower upper cross beams, cable tower lower cross beams, bearing platforms and a pile foundation, a double-column portal frame structure is formed between the cable tower towers through the cable tower upper cross beams and the cable tower lower cross beams, the cable tower towers adopt rectangular hollow thin-wall sections, the cable tower upper cross beams and the cable tower lower cross beams adopt prestressed concrete box-shaped sections, the bearing platforms are connected to the bottoms of the cable tower towers, and the bearing platforms are fixed in the foundation through the pile foundation.
5. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the steel truss stiffening girder consists of a steel truss and a bridge deck system; the steel truss consists of a main truss, a main transverse truss and upper and lower horizontal couplings, wherein the main truss consists of an upper chord member, a main truss diagonal web member, a lower chord member and a main truss vertical web member, the upper and lower horizontal couplings adopt a K-shaped system, the main transverse truss consists of an upper cross beam, a lower cross beam, a main transverse truss vertical web member and a main transverse truss diagonal web member,
the bridge deck system adopts the combination form of I-shaped steel longeron and concrete decking, supports on the steel truss through the support.
6. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the main cable saddle on the cable tower adopts a rib force-transferring cast-weld combined cable saddle; the cable saddle adopts a swing shaft type cast-weld combined cable saddle; the saddle groove of the novel roller type cable saddle is cast by cast steel, and the base is welded by a steel plate; a rolling pair is arranged below the novel roller type cable saddle; vertical clapboards are arranged in the saddle groove along the bridge direction, the top of the saddle groove is filled with zinc blocks, the side wall of the saddle groove is clamped through bolts, and transverse stiffening ribs are arranged on the saddle body.
7. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the gravity type anchorage is composed of an anchor block, a gravity anchor front anchor chamber, a cable saddle buttress and a gravity anchor rear anchor chamber, wherein the gravity anchor front anchor chamber and the gravity anchor rear anchor chamber are closed spaces, a dehumidifier is arranged in each closed space, and the anchor block, the cable saddle buttress and the anchor chamber form a complete three-rod herringbone-structured space stress component.
8. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the tunnel type anchorage is composed of a conical anchor plug body, a tunnel anchor front anchor chamber, a cable saddle foundation and a tunnel anchor rear anchor chamber.
9. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: one end of the central buckle stay cable is connected with the main cable through a cable clamp, the other end of the central buckle stay cable is anchored on the steel truss stiffening girder through an anchor cup and a forked lug plate, and the central buckle stay cable is made of a high-quality steel core steel wire rope.
10. A terrain-specific, earth-anchored suspension bridge structure as defined in claim 1, wherein: the anchor block is characterized in that vertical ground anchor slings are further connected to sling-free sections on two sides of the main cable, each vertical ground anchor sling is composed of an anchor base, a concrete cushion pier and a pre-stressed anchor rod, the anchor bases and the concrete cushion piers are connected through the pre-stressed anchor rods, and the bottoms of the pre-stressed anchor rods penetrate through the concrete cushion piers and are inserted into the foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110358360.9A CN113235389A (en) | 2021-04-01 | 2021-04-01 | Ground anchor type suspension bridge structure suitable for special terrain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110358360.9A CN113235389A (en) | 2021-04-01 | 2021-04-01 | Ground anchor type suspension bridge structure suitable for special terrain |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194744A (en) * | 2022-01-05 | 2022-03-18 | 四川省自贡运输机械集团股份有限公司 | Suspension cable belt conveyor |
| CN114922085A (en) * | 2022-06-09 | 2022-08-19 | 湖南科技大学 | Assembly type tunnel anchor system and construction method |
-
2021
- 2021-04-01 CN CN202110358360.9A patent/CN113235389A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114194744A (en) * | 2022-01-05 | 2022-03-18 | 四川省自贡运输机械集团股份有限公司 | Suspension cable belt conveyor |
| CN114194744B (en) * | 2022-01-05 | 2023-12-08 | 四川省自贡运输机械集团股份有限公司 | Suspension cable belt conveyor |
| CN114922085A (en) * | 2022-06-09 | 2022-08-19 | 湖南科技大学 | Assembly type tunnel anchor system and construction method |
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